hotfix: change cost_per_proof_chart var name (#1711)

Author: uri-99

explorer/lib/explorer_web/live/eth_converter.ex

@@ -58,6 +58,8 @@ defmodule EthConverter do
     end
   end
 
+  defp round_to_sf(%Decimal{coef: 0} = _value, _sf), do: Decimal.new("0")
+
   defp round_to_sf(value, significant_figures) do
     # Convert the value to a float and calculate the magnitude
     value_float = Decimal.to_float(value)

explorer/lib/explorer_web/live/pages/home/index.ex

@@ -154,7 +154,7 @@ defmodule ExplorerWeb.Home.Index do
     |> assign(
       stats: [],
       latest_batches: [],
-      cost_per_proof_data: %{points: [], extra_data: %{}},
+      cost_per_proof_chart: %{points: [], extra_data: %{}},
       batch_size_chart_data: %{points: [], extra_data: %{}}
     )
   end